1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecf5b5583f27b9f1d19742a122ceb8b33e518b622d9bd16a7ee0e11f5c0eb5. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/423787c1-2977-4eaa-bb7f-cbe2f93bf200.json and https://artists.proofprofile.net/proofs/artist/423787c1-2977-4eaa-bb7f-cbe2f93bf200.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata a otto Viole con una Tromba: II. Aria
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd046b1b9f8b604eaea11252e879b23cba19172a621642d0a5e729517ed0756. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725502.
Sonata a otto Viole con una Tromba: III. Canzona
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f892008fc1d43e42cb5e0cea72088cfcb3d9b1da974f2e877532c019b79258. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725503.
Sonata a due Trombe detta del Gucciardini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04560ab4889621700cb9fe6100d443b508df6eb3a352f9bbd602a931a40ee629. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725507.
Concerto di Trombe a tre Trombette: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f911bc0f5b2b3ad4b31254a401d6bfcdbde78bb38da11c908f0ced38e4557d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725512.
Gli amanti generosi: Sinfonia: a. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2511868293900c3752d9549a4680dffedb034e1203c092f75abbc78e7b67e4cf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725515.
Gli amanti generosi: Sinfonia: b. Largo e staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5becd8454eed4c1913ffd56dfefd8a320ef31e0ff377d30f3fc52e42bd33b387. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd720c8da236ef0d4087d0a47a833f90f203067a62358682df4b899d68a206296. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a60dd488d2ef1e3cfe52a6b1c01410c230f4dce39a1d995e9f3264bdb00296. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY8725520.
Francesco Mancini: 12 Sonate per flauto e il suo basso, Volume secondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c37efe29090d34edb2319e3873fb119f821531338704ef4f19cf548cbdf3479. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ391272628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f51475e29289454e8a0fe5ea602c456bcf362410f0eb2a3e1b7d7ac29ad791. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITZ391272636.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Francesco Mancini: XII Solos Vol. 2 (Recorder Sonatas) for a Flute with a Thorough Bass for the Harpsicord [London: J. Barrett & W. Smith]
Mancini: XII Solos Vol. 1 - Recorder Sonatas (For a Flute with a Thorough Bass for the Harpsicord - London: J. Barrett & W. Smith)
Francesco Mancini: 6 Sonate Per Flauto E Cembalo (Londra1724)
Mancini: Works for Recorder & Harpsichord
Francesco Mancini - Seven Recorder Sonatas
Sette sonate a Napoli (Hautbois et orgue)
Mancini: 12 Sonate per Flauto e Basso Continuo
Francesco Mancini: Sei Sonate Per Flauto Dolce Basso Continuo
Mancini : Sonata for Recorder & 2 Violins in D minor : I Amoroso
The Collected Recordings of Il Giardino Armonico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b34394e3ab0bae3ad90f434ff8b76afa461ad619e3c168b0c57faa97bc23a3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809316401.
Mancini : Sonata for Recorder & 2 Violins in D minor : III Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd24443915ddb37871d8a3b79afc23f173d6e5798987ae79845e0f4d47726809. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809316403.
Mancini : Sonata for Recorder & 2 Violins in D minor : IV Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363076fa1c62b585b9e730cde8c67de47781d4aae78b0f7fda3f5678292101f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809316404.
Sonata No. 14 in G Minor: III. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360272cd6c247e58b0f55d2445119c29eecfb978851d12849ac14aa3631e294. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471800007.
Mancini : Sonata for Recorder & 2 Violins in D minor : II Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb281302934a8d98946d8b7b935b59ca3cd528cc97af5d2c88e630aa4022fcc0d. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809316402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2373c0ea7914286010bc1aa7268c9b0128087887359fbea3c7e6095c8f441cb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b06dcfa55435fa9a79298a9f6dfdc5fe3554d381503601dbf5f35ff67486b4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471800006.